836240861 has 8 divisors (see below), whose sum is σ = 838992504. Its totient is φ = 833495040.

The previous prime is 836240803. The next prime is 836240893. The reversal of 836240861 is 168042638.

It is a happy number.

836240861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 56100100 + 780140761 = 7490^2 + 27931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-836240861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (836240161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686525 + ... + 687741.

It is an arithmetic number, because the mean of its divisors is an integer number (104874063).

Almost surely, 2^836240861 is an apocalyptic number.

It is an amenable number.

836240861 is a deficient number, since it is larger than the sum of its proper divisors (2751643).

836240861 is a wasteful number, since it uses less digits than its factorization.

836240861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2911.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 836240861 is about 28917.8294655737. The cubic root of 836240861 is about 942.1291938179.

The spelling of 836240861 in words is "eight hundred thirty-six million, two hundred forty thousand, eight hundred sixty-one".